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Statement of a problem № 3651

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Three charges, each of value q , are placed at the corners of an equilateral triangle. A fourth charge Q is placed at the centre of the triangle. (i) If Q = -q will the charges at the corners move towards the centre or fly away from it? (ii) For what value of Q will the charges remain stationary?

Solution:
Three charges, each of value q , are placed at the corners of an equilateral tri

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